Discharge tube for electrical apparatus



Mar. 2Q, 1923.

G COLLINS mscnmen TUBE FOR ELECTRICAL APPARATUS Filed Sept. 50, 1920 GEORGE COLLINS, SF CHIGAGO, ILLINOIS, ASSIG-NOR TO J. J. BLEAIDON, OF CHICAGO, ILLINOIS.

DISCHARGE TUBE FOR ELECTRICAL APPARATUS.

Application filed September 30, 1920. Serial No. 413,805.

To aZZ whom it may concern:

Be it known that l, Gnoneu COLLENS, a citizen or"? the United States, and a resident 9? C icago, in the county of Cook and State A l 5 Illinois, have invented certain new and useiiul Improvements in Discharge Tubes for Electrical .Pipparatus, of which the followin is a specification.

This invention relates to discharge tubes for electrical apparatus and particularly for medico-electricul apparatus, whereby electrical discharges are applied to various parts of the body, for the treatment of skin diseases or the like.

Such discharges in many cases are effected by inserting a vacuum tube having a terminal at one end thereof, into proper contact *ith a coil or other apparatus, the discharge passing along the vacuum tube and out therefrom to the area to be treated. One of the objects of the present invention is to provide a discharge tube simple and economical in construction, whereby a varying resistance to the discharge may be effected so as to modify the strength of the treat ment The drawing is an elevation of the discharge tube, constructed in accordance with the invention of which it presents an illustrative form.

in the drawiz g; I provide a tube 1, preferably of glass, having a dumb bell shaped enlargement transversely mounted at its top and comprising two lobes 2 and 3. The tube 1 is in open communication with the lobe 2 and a closure l applied in the re stricted part of the enlargement, seals the two lobes 2 and 3 from each other. The tube 1 and the lobe 2 are exhausted from the lower end of the tube 1, after which the metallic cap 5 and terminal 6 are mounted t iereon. The tube 3 is separately exhausted through an aperture which when sealed appears as the nipple T in the drawing.

This tube may be inserted in an electric coil or other suitable apparatus, contact be ing made through the metallic cap 5, discharge taking place from the terminal 6.

The discharge follows the vacuum as long as possible before passing through the air to the area under treatment. Thus it the face or end of the lobe 2 be applied adiacent the skin, discharge will pass from the terminal 6 through the vacuum tube 1, through the enlargement 2 and out the end thereof. If, however, the opposite end of the dumb-bell shaped enlargement, the end of the lobe 3, be placed adjacent the area of the treatment, the discharge will pass substantially through the same path as before, and in addition through the separate vacuum in the lobe 3. By these means an additional resistance is interposed in the path of the discharge which is correspondingly reduced to produce a milder treatment.

The selective use of either end of the dumb-bell shaped enlargement, combined with the possibilities for variation afforded by the adjustment of the generating coil aflord a wide range of treatment. The structure is exceedingly simple, economical. to make and exceedingly convenient in its application, mere reversal of position of the dumb-bell shaped enlargement effects immediate substantial modiiication in region of the treatment.

Having now described my invention, 1 claim 1. A tube for electrical discharge for use in medical treatment, comprising a plurality of separate vacuums, so arranged that one or more thereof may electively be interposed in the path of the discharge.

2. In electro-medical apparatus, a discharge tube comprising a shank, e-. larged discharge bulb thereon and a closure between the shank and the bulb, the tube being exhausted on both sides of the closure.

3. ln electro-medical apparatus, a discharge tube comprising a shank, an enlarger discharge bulb, said bulb being constricted at the middle and there provided with closure, said shank being connected on one side of said closure, and the bulb being exhausted on both sides thereof, whereby a varying resistance to the discharge may be provided.

4. In electro-medical apparatus or the like, a discharge tube comprising a shank, an enlargement thereon of substantial duinlr bell form, having its axis transverse to the axis of the shank, said shank being con nected to one lobe of the enlargement, the other lobe being sealed therefrom, and both lobes being exhausted.

5. In electro-medical apparatus or the like, a discharge tube comprising a shank.

' an enlargement thereon of substantial dumbbell form, having its axis transverse to the axis of the shank, said shank bemg in open communication with one lobe ofthe enlargement, the other lobe being sealed therefrom, the parts of the apparatus on opposite sides of thesealbeing separately exhausted.

6. The method of making an electrical discharge tube, Which consists in blowing an integral tube comprising ashankand'an enlargement of dumb-bell form thereon, said shank being in open communication With one lobeof the enlargement, forming a 10 closure in the narrow part of theenlarge ment, exhaustlng the apparatus from the fine end of the shank, and from the sealed lobe,.. I Y

In Witness whereof, I hereunto subscribe l5 inyname this 9th day of September, A. D. a

GEORGE COLLINS. 

